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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- string str;
- int str2[100];
- int i,j;
- cin>>str;
- for(i=0,j=0; i<str.size(); i=i+2,j++)
- {
- str2[j]=str[i]-'0';
- }
- sort(str2,str2+j);
- for(i=0; i<j; i++)
- {
- if(i==j-1)
- cout<<str2[i];
- else
- cout<<str2[i]<<"+";
- }
- }
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